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Home >> Toyota >> 2004 >> ECHO 2D Sedan, Standard >> Repair and Diagnosis >> General Information >> Identification >> Introduction >> Repair Instructions >> General Information >> Basic Repair Hint

Basic Repair Hint

  1. Prevent damage and maintain vehicle cleanliness by protective covering on the fender, seat and floor.
  2. During disassembly, line up parts in the order they were removed to facilitate reassembly.
  3. Installation and removal of battery terminal:
    Fig 1: Removing/Installing Battery Terminal
    G02904906Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Before performing electrical work, disconnect the negative (-) terminal cable from the battery.
    2. If it is necessary to disconnect the battery for inspection or repair, first disconnect the negative (-) terminal cable.
    3. To prevent damage to the battery terminal when disconnecting the terminal cable, loosen the cable nut and raise the cable straight up. Do not twist or pry the cable off.
    4. Clean the battery terminals and cable ends with a clean shop rag. Do not scrape them with a file or other abrasive objects.
    5. Install the cable ends to the battery terminals after loosening the nut, and tighten the nut after installation. Do not use a hammer to tap the cable ends onto the terminals.
    6. Be sure the cover for the positive (+) terminal is properly in place.
  4. Check hose and wiring connectors to make sure that they are connected securely and correctly.
  5. Non-reusable parts:
    1. Always replace cotter pins, gaskets, O-rings, oil seals, etc. with new ones.
    2. Non-reusable parts are indicated in component illustrations by the " diamond" symbols.
  6. Precoated parts

    Precoated parts are bolts, nuts, etc. that are coated with a seal lock adhesive at the factory.

    1. If a precoated part is retightened, loosened or moved in any way, it must be recoated with the specified adhesive.
    2. When reusing precoated parts, clean off the old adhesive and dry with compressed air. Then apply new seal lock adhesive to the bolt, nut or threads.
      Fig 2: Applying Seal Lock Adhesive
      G02904907Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Precoated parts are indicated in component illustrations by the " Star " symbols.
  7. When necessary, use a sealer on gaskets to prevent leaks.
  8. Carefully observe all specifications for bolt tightening torques. Always use a torque wrench.
  9. Use of special service tools (SST) and special service materials (SSM) may be required, depending on the nature of the repair. Be sure to use SST and SSM where specified and follow the proper work procedure.
  10. When replacing fuses, be sure the new fuse has the correct amperage rating. DO NOT exceed the rating or use one with a lower rating.
    Fig 3: Identifying Medium Current Fuse And High Current Fuse Equal Amperage Rating
    G02904908Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 4: Identifying Fuse Symbol Chart
    G02904909Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  11. Care must be taken when jacking up and supporting the vehicle. Be sure to lift and support the vehicle at the proper locations (See VEHICLE LIFT AND SUPPORT LOCATIONS  ).
    • Release the parking brake on a level surface and shift to in Neutral or N range.
    • When jacking up the front wheels of the vehicle, at first place stoppers behind the rear wheels.
    • When jacking up the rear wheels of the vehicle, place stoppers in front of the front wheels.
    • When jacking up only the front or rear wheels, set rigid racks and place stoppers on front and behind the wheels in contact with the ground.
    • After the vehicle is jacked up, be sure to support it on rigid racks. It is extremely dangerous to do any work on a vehicle raised on a jack alone, even for a small job that can be finished quickly.
  12. Observe the following precautions to avoid damage to the following parts:
    1. Do not open the cover or case of the ECU unless absolutely necessary. (Static electricity transmitted through human touch may destroy the IC.)
    2. To disconnect vacuum hoses, pull off the end of the hose, not the middle.
      Fig 5: Disconnecting Vacuum Hoses
      G02904910Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. To pull apart electrical connectors, pull on the connector itself, not the wires.
      Fig 6: Pulling Apart Electrical Connectors
      G02904911Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Be careful not to drop electrical components, such as sensors or relays. If they are dropped on a hard floor, they should be replaced and not reused.
    5. When steam cleaning an engine, protect the electronic components, air filter and emission-related components from water.
    6. Never use an impact wrench to remove or install temperature switches or temperature sensors.
    7. When checking continuity at the wire connector, insert the tester probe carefully to prevent terminals from bending.
    8. When using a vacuum gauge, never force the hose onto a connector that is too large. Use a step-down adapter for adjustment. Once the hose has been stretched, it may leak air.
  13. Installation and removal of vacuum hose:
    1. When disconnecting vacuum hoses, use tags to identify where they should be reconnected to.
      Fig 7: Identifying Vacuum Hoses Using Tags
      G02904912Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. After completing a job, double check that the vacuum hoses are properly connected. A label under the hood shows the proper layout.
  14. Unless otherwise stated, all resistance should be measured at an ambient temperature of 20°C (68°F). Measurement should be made after the engine has cooled down. If measured at high temperatures immediately after the vehicle has been running, resistance may be outside specifications.
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